What gives us the authority to deny other nations Weapons of

What gives us the authority to deny other nations Weapons of Mass Destruction is beyond me!
What gives us the authority to deny other nations Weapons of Mass Destruction?

We have weapons of mass destruction & we use them as deterrence. So, how can we deny others the right to protect themselves using the same deterrence? Maybe it is because in this day & age, weapons of mass destruction are sought by many as deterrence from US aggression & occupation.

Example: North Korea! North Korea is much more of a threat to the US than Iraq ever was. And why didn